Farmed salmon more toxic than wild salmon, study finds
(The researchers also found that toxin levels in European farm-raised salmon were significantly higher than in North American or South American farm-raised salmon. Levels of PCBs, dioxins, toxaphene and dieldrin were highest in farmed salmon from Scotland and the Faroe Islands (Denmark) and lowest in farmed salmon from Chile and Washington state, though Hites pointed out that even these comparatively uncontaminated South American salmon had high levels of other toxins.)

08.01.2014 - The Guardian
(Avoid farmed salmon from Scotland and the Faroe Islands, and buy wild salmon if possible. For fish from these areas, the monthly limit was a mere quarter of a serving, equating to three servings a year. Wild salmon can be consumed at levels as high as eight meals per month, according to the study.)

Anfrage der Linken mit Antwort der Bundesregierung zum Thema Zoos (pdf)